button{
    height: 60px;
    width: 80px;
    margin: 5px;
    background: #199cff;
    border-width:1px;
    font-size: 18px;
}
span{
    height: 200px;
    width: 200px;
    margin: 5px;
    font-size: 20px;
}

.D1{
    height: 800px;
    width: 300px;
    background: #fff;
}
.B{
    height: 40px;
    width: 80px;
    margin: 5px;
    border-radius: 5px;
}
.Dm{
    height: 60px;
    width: 200px;
    font-size: 40px;
    background: #ffffff;
    border-radius: 10px;
}
.logo {
    height: 50px;
    width: auto;
}
.title {
    font-size: 25px;
    color: cornflowerblue;
    font-family: "HarmonyOS Sans SC";
}